Electric switch system.



Nd. 721,942. 7 v PATENTED MAR. 3, 1903.

A. L. DE LEEUW.

ELECTRIC SWITCH SYSTFW.

I APPLICATION FILED nov. 24, 19L Y no MODEL. 2 SHEETS-SHEET 1.

W, guygmw Witnesses: Inventor Attorney v N0.721,94 2. PATENTED MAR.3,1903L.

A. L. DE LEEUW.

ELECTRIC SWITCH SYSTEM.

APPLICATION FILED NOV. 24, 1902.

N0 MODEL, I 2 sums-mum z.

I /3\Z v I Witnesses: Inventor Attorney I UNITED STATES PATENT OFFICE.

ADOLPII LQDE LEEUW, OF HAMILTON, OHIO, ASSIGNOR TO THE NILES TOOL WORKS COMPANY, OF HAMILTON, OHIO.

ELECTRIC SWITCH SYSTEM SPECIFICATION forming part of Letters I atent N 0. 721,942, dated March 3, 1903. I Application filed November 24, 1902. Serial No. 132,553. (No model.)

To all whom it may concern:

Be it known that I, ADOLPH L. DE LEEUW, a citizen of the United States, residing in Hamilton, Butler county, Ohio, have invented certain new and useful Improvements in Electric Switch Systems, of which the following is a specification.

In the controlling of machines cases arise in which an efiect is to be produced when to some part is in a certain one of several conditions or positions, or as an alternative when the part is in another conditioner position, or again when the part is in either of several conditions or positions. A specific example may be found in metal-planing machines in which feeding motion is to be given to the tool for each working stroke of' the table, the feeding of the tool to take place not during but between the strokes of the table. desirable to have the machine provided with controlling devices, by means of which the operator can selectively determine that the feeding motion shall take place prior. to the beginning of the cutting stroke or after the beginning of the cutting str0ke,-or both. prior to and after the cutting stroke.

My invention pertains toan electric switch adapted for such selective control of machinery, and in exemplifying my invention I will assume it as being employed in connection with a metal-planin g machine for the purpose of controlling the time when the feed-, ing motion is to take place relative to the strokes of the table.

My invention will. be readily understood from the following description, taken in connection with the accompanying drawings, in whicli- Figure 1 is a diagram illustrating an exemplification' of the system, and Fig. 2 a front elevation of the exemplifyingconstruction.

In the drawings, but giving attention exclusively to Fig. 1, 1 indicates a switch-arm, shown in its leftward position, buthaving also a position to the right; 2, a connection from this switch-arm to some part of the machine in connection with which the device is to be employed, this connection leading in the assumed case of a metal-planing machine to any moving part of the reversing-gear of the planer, so that when the table is moving in one direction the switch-arm 1 will be to the left and when the table is moving in the other direction the switch-arm will be to the right, the switch-arm thus moving from one position to the other while the table motion is being reversed; 3, a connection from the machine to serve, as this connection is shifted, to cause some desired effect to be produced upon the machine-for instance, to cause the feeding .of the tool to take place in a metal-planing machine, in which case the connection 3vwill have suitable connection with the feed-works of the planer, as by being connected with the latch, which when released permits a feedcrank to make a turn; 4, a solenoid; 5, its core, having the connection 3 attached to it, so that the inward movement of the core produces the effective movement of the connection 3; 6, a contact segment engaged by switch-arm 1 at all times; 7, a contact-segment engaged by switch-arm 1 when the switch-arm is to the right; 8,' a contact-segment engagedby the switch-arm 1 when the switch-arm is to the left; 9, a hand-switch; 10, a contact for switch 9; 11, an alternative contactfor switch 9 '12, a second hand-switch; 13, a contact for switch 12; 14, an alternative contact for switch 12; 15, a 'second'switcharm; 16, a contact-segment for switch-arm 15 of such length that the switch-arm may pass beyond each of its ends as the switcharm makesits complete movement; 17, a second similar contact-segment for switch-arm 15, the switch-arm in passing over the segments serving to bridge between them; 18, a

second solenoid; 19, its core, connected with switch-arm 15 and serving when the solenoid is energized to move the switch-arm to'its upper position, the gravity of the switch-arm and core serving in the present case to carry the switch-arm to its lower position, it being understood that both the upper and lower positions of this witch-arm are idle or inactive ones; 20, one f the mains leading from any" suitable source of current and going to contact 14:; 21, the other main, going to contact-segments 17 and to solenoid 18; 22 to 29, inclusive, electricalconnections between the parts heretofore referred to, and 30 a vent-hole in the inclosed end of the bore of solenoid 18, of such restricted size as to retard the inflow derived from solenoid i and no feeding iming he motion of the core.

machine it is to be understood, then, that say, just prior to the beginning of the cut-.

. backing stroke of the tableresult will be that switch-arm will be raised toits upper position, which, like its lowerpo- "sult being that the solenoid became tempofall to its lower position;

and outflow of air to the bore as the core reciprocates therein, and thus serve in retard- In the assumed case of a metal-planing switch-arm 1 takes position to the left when the table motion is reversed for-the beginning of the cutting stroke and that it takes position to the right when? the table motion is reversed for the beginning of the backing stroke.- It is furthermore to be understood that if connection 3 be for an instant shifted to the left it will bring about a feeding im-- pulse of the planer. lit-may be desired that this feeding impulse shall take place only when switch-arm 1 goes to the left-that is to ting stroke. Again, it' may be desired that this feeding impulse shall take ,place only when the switch-arm goes to the rightthat is to say, just prior to the beginning of the Again, it may be desired that feeding im -ulse shall take place at both the beginni g and the end of the cutting stroke.

Hand-switch 12 determines by its position whether the feeding impulse shall take placeat one end only of the cutting stroke or at bothv ends and hand-switch 9 deter1nines, by its position at which end of the cutting stroke the feeding'impulse shall take place if it is to occur at one end only of the cutting stroke. As the parts are shown in Fig.1 the switches, are set to bring about a feeding impulse asa result. of the movement of connection 3 only at the beginning of the cutting stroke, or when switch-arm 1 goes to the left.

Starting with main and tracing'the ci'runit through its route through 22 9 238 l 6 13 12 29 4 28 16 17 to main 21 we find thatthis circuit includes solenoid 4, but that it isopen at segments 16 and 17, the solenoid being therefore" inert; but tracing from main 20 through route 22 9 23 '8 1 6 25 26 18 27 to main 21 we find that solenoid 18'is energized. The

sition, is an inactive one, but in passing upward over segments 16 and 17 it temporarily; closed the circuit through solenoid 4, the rerarily'energized and connection 3 given an excursion, resulting in a'feeding impulse for the assumed planing-machine. Now, assuming that the cutting stroke is completed and the table motion reversed, we-will find switcharm 1 moved to the right. Then tracing from main 20 through the route 22 9 23 8, its. only route,we find the circuit openat segment 8, the result being that there can be no elfect" pulse will occur atthe end of the cutting stroke. -As switch-arm 1 left' segxnent' 8 it opened the general circuit, thus den'ergizing so1enoid18 and permitting switch-arm 15 to butthe main circuit being open at 8 the passage of switch-arm begins its cutting stroke; but as ,the

15 over segments 16 and 17 was without efiect upon solenoid 4. Under the assumed and illustrated positions for hand-switches 9 and 12 we see that an "impulse for connection 3 was an incident only to" tlfe movement. of switcharm 1 to its leftward position, the movementaof that switcharnr to the rightward position being without effect. Now assume hand-switch 9 to be shifted .to contact 11. We then seethat any circuit dependent on segment 8' will be open at contact 10,- the consequence being that'no current can. go to -'the parts as an incident to switch-arm'1 being in its leftward position. The feeding impulse will therefore not be given to the planer as it cutting stroke ends and the table motion reverses, .we will find switch-arm l to the right and engaging segment 7.. We now trace'fr'om main 20 through route 22, 9, 11, 24, 7, 1, 6, 25, 26,18,

and 27 to main 2'1 and find solenoid 18 energized, the result .being'that switch-arm 15 goes up, as in the former case, and causes the temporary energization of solenoid4 and the giving of ahexcursionto connection 3. There fore when hand-switch 9 is to contact 10' an impulse will be given to connection 3on1 when connectioi1 2 goes to the left, and when the hand-switch is put to contact 11 an im- .pulse willbe given to connection 3 only when connection 2 goes to the right. Hand-switch 9 therefore-serves in making a selection from two conditions or positions, of one conditionor position under which an impulse shall occur at,conneetion 3. Now with all other parts in the-position indicated in Fig. 1, as-' sume hand-switch 12 to be put to contact '14. We trace from'main. 20 through route, 14, 22, 9, 10, 23, s, 1, '6, 25, 2e, 18,.and 27 to main 21 and find solenoid 18 energized, the result being the upward movement of switch-arm l5- and the energization of solenoid 4 and an. ex-

cursion forconnection 3. An impulse .f0r

connection 3. thus becomes an incident tothe lefitward location of switch-arml. The energizing-circuit through solenoid 4 will have a-somewliat ifferent route than in the previous cases, for it will be from 29 through 12 too IIO

and 14 to main 20 instead of through 1325, 1

8rd. Thus whenhand-switch 12 is at contact 14 we find an impulse for connection 3, re-

sulting from the leftward position of connec-. tion 2. When hand-switch 12 being on contact 14 switch-arm 1 goes tetheright, we

trace from line 20 through any route and find no current through solenoid 18; butwhile switch-arml was at the left the solenoid was energized through a route which we have heretofore traced, and when that switch-arm moved to the right off (if-segment 8 it opened the "circuit-energizing solenoid 18, thus perinitting switch-arm 15 'to fall andsweep segments 16 and 17 and bring about the energization of solenoids t rough a direct route including 12 and 14. herefore when'handswitch 12 is at contact 14 an impulse will be given to connection 3 as an incident to either the rightward or leftward movement of connection 2. Briefly, then, hand-switch 12 de- 'termines whether connection 3 shall receive an impulse as an incident to both movements 9 be on contact 10 or contact 11, so long as it is on one of them". r

Fig. 2 illustrates a practical embodiment of the system in the form of a self-contained. apparatus whose features of construction will be obvious from the drawings, it being only necessary to state that the hand-switches 9 and 12 are here illustrated as of the jackknife type and that, in addition to the parts which have been heretofore considered, 31 indicates the foundation-slab for the parts; 3-2, the bindingposts for various connections; 33, insulated prolongations of the contact-segments to produce continuous surfaces for the switch-arms, and 34* the jacket-housings of the solenoids; 1

I claim asmyinVeritionu 1. In an electric switchhsystem, the combination,substantially as stt forth, of a nor-' mally open first circuit, a translating device included therein, a first switch for temporarily closing said open circuit, a second circuit, a second translating .device included in said second circuit, mechanism operatively connecting the second translating." device with, said first switch, a second switch disposed'in the second circuit and having'slternative con-- tacts of closure, a first hand-switch and a .7

second hand-switch, each having alternative contacts of closure, and electrical connections between said hand-switches and circuits, whereby one position ofvthe first handswitch results, in the first translating device being energized only under one selected condition of said second switch and wherehyanother position of the first hand-switch results in the first translating device being energized only under another selected condition ofsaid second switch, and whereby the shifting of the second switch causes the first translating device to be energized under a plurality of conditions of said second switch, substantially as set forth.

2. In an electric switch system, the combination of a first circuit, a first solenoid and core included therein, a mechanical connection from said core to transmit an eifect therefrom, a normally open first switch in said first circuit, a second solenoid having a core connected with said first switch for operating it, a second circuit connected with said first switch and second solenoid, a second switch connected with both said circuits, amechanical connection to serve in giving operative movements to said second switch, a hand-switch connected with said first circuit and second switch, and a hand-switch connected with the'first circuit and second circuit, arranged and operating substantially as set forth.

ADOLPH L. DE LEEUW.

Witnesses v ELMER R. SHIPLEY,- H. R; REIGART. 

